[6.x] Fix for dropping columns when using MSSQL as database (#39905)

Author: SyotaOkaniwaITR

src/Illuminate/Database/Schema/Grammars/SqlServerGrammar.php

@@ -212,7 +212,7 @@ public function compileDropDefaultConstraint(Blueprint $blueprint, Fluent $comma
 
         $sql = "DECLARE @sql NVARCHAR(MAX) = '';";
         $sql .= "SELECT @sql += 'ALTER TABLE [dbo].[{$tableName}] DROP CONSTRAINT ' + OBJECT_NAME([default_object_id]) + ';' ";
-        $sql .= 'FROM SYS.COLUMNS ';
+        $sql .= 'FROM sys.columns ';
         $sql .= "WHERE [object_id] = OBJECT_ID('[dbo].[{$tableName}]') AND [name] in ({$columns}) AND [default_object_id] <> 0;";
         $sql .= 'EXEC(@sql)';
 

tests/Database/DatabaseSqlServerSchemaGrammarTest.php

@@ -122,7 +122,7 @@ public function testDropColumnDropsCreatesSqlToDropDefaultConstraints()
         $statements = $blueprint->toSql($this->getConnection(), $this->getGrammar());
 
         $this->assertCount(1, $statements);
-        $this->assertEquals("DECLARE @sql NVARCHAR(MAX) = '';SELECT @sql += 'ALTER TABLE [dbo].[foo] DROP CONSTRAINT ' + OBJECT_NAME([default_object_id]) + ';' FROM SYS.COLUMNS WHERE [object_id] = OBJECT_ID('[dbo].[foo]') AND [name] in ('bar') AND [default_object_id] <> 0;EXEC(@sql);alter table \"foo\" drop column \"bar\"", $statements[0]);
+        $this->assertEquals("DECLARE @sql NVARCHAR(MAX) = '';SELECT @sql += 'ALTER TABLE [dbo].[foo] DROP CONSTRAINT ' + OBJECT_NAME([default_object_id]) + ';' FROM sys.columns WHERE [object_id] = OBJECT_ID('[dbo].[foo]') AND [name] in ('bar') AND [default_object_id] <> 0;EXEC(@sql);alter table \"foo\" drop column \"bar\"", $statements[0]);
     }
 
     public function testDropPrimary()